Strathprints Home | Open Access | Browse | Search | User area | Copyright | Help | Library Home | SUPrimo

Estimating rate of occurrence of rare events with empirical bayes: a railway application

Quigley, John and Bedford, Tim and Walls, Lesley (2007) Estimating rate of occurrence of rare events with empirical bayes: a railway application. Reliability Engineering and System Safety, 92 (5). pp. 619-627. ISSN 0951-8320

Full text not available in this repository. (Request a copy from the Strathclyde author)

Abstract

Classical approaches to estimating the rate of occurrence of events perform poorly when data are few. Maximum likelihood estimators result in overly optimistic point estimates of zero for situations where there have been no events. Alternative empirical-based approaches have been proposed based on median estimators or non-informative prior distributions. While these alternatives offer an improvement over point estimates of zero, they can be overly conservative. Empirical Bayes procedures offer an unbiased approach through pooling data across different hazards to support stronger statistical inference. This paper considers the application of Empirical Bayes to high consequence low-frequency events, where estimates are required for risk mitigation decision support such as as low as reasonably possible. A summary of empirical Bayes methods is given and the choices of estimation procedures to obtain interval estimates are discussed. The approaches illustrated within the case study are based on the estimation of the rate of occurrence of train derailments within the UK. The usefulness of empirical Bayes within this context is discussed

Item type: Article
ID code: 4873
Keywords: rare events, empirical Bayes, railway, reliability engineering, system safety, credibility theory, zero failure, estimation, homogeneous Poisson process, Management. Industrial Management
Subjects: Social Sciences > Industries. Land use. Labor > Management. Industrial Management
Department: Strathclyde Business School > Management Science
Related URLs:
    Depositing user: Strathprints Administrator
    Date Deposited: 19 Jan 2008
    Last modified: 12 Mar 2012 10:41
    URI: http://strathprints.strath.ac.uk/id/eprint/4873

    Actions (login required)

    View Item